J Adv Prosthodont.  2019 Oct;11(5):286-296. 10.4047/jap.2019.11.5.286.

Choice of resin cement shades for a high-translucency zirconia product to mask dark, discolored or metal substrates

Affiliations
  • 1Jiangsu Key Laboratory of Oral Diseases; Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China. xhf-1980@126.com
  • 2Jiangsu Key Laboratory of Oral Diseases; Department of Endodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China.

Abstract

PURPOSE
The aim was to study the masking ability of high-translucency monolithic zirconia and provide guidance in selecting resin luting cements in order to mask discolored substrates.
MATERIALS AND METHODS
160 high-translucency zirconia specimens were divided into 32 groups depending on their thickness and shades. Using five shades of try-in paste, the specimens were luted onto the sub strates (Co-Cr, precious-metal, opaque porcelain-sintered Co-Cr, opaque porcelain-sintered precious-metal, and 5M3-shade zirconia). All CIELAB color parameters were measured and statistically analyzed.
RESULTS
Zirconia shade and thickness and try-in paste shade affected CIELAB color parameters (P=.000) in different substrates groups, and there were interactions among these factors (P=.000). All five try-in paste shades can be chosen to achieve ΔE values of zirconia with 1.2 - 1.5 mm for masking dark-tooth-like 5M3-shade and zirconia with 1.5 mm for masking precious-metal groups < 2.6. Only suitable try-in paste shades were used, can ΔE values that less than 2.6 be achieved when applied translucent monolithic zirconia with 0.7-1.0 mm for masking dark-tooth-like 5M3-shade and zirconia with 0.7 - 1.2 mm for masking precious-metal groups.
CONCLUSION
Choosing suitable resin cement shades is necessary for high-translucency monolithic zirconia to achieve ideal masking ability (ΔE < 2.6) on the dark-tooth.

Keyword

Resin cement; Color; Zirconia; Post-core; Spectrophotometry

MeSH Terms

Masks*
Resin Cements*
Spectrophotometry
Resin Cements
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